An Introduction to Additive Manufacturing (Prof. John Hart, MIT)

From 2.008x on edX, by Prof. John Hart from MIT
www.edx.org/course/fundamenta...
00:00:00 - Introduction to Additive Manufacturing (AM)
00:10:46 - Importance and Implications of AM
00:28:34 - Overview of AM Processes
00:40:08 - Extrusion (FFF, FDM)
00:59:19 - Photopolymerization (SLA, DLP)
01:12:17 - Powder Bed Fusion (SLM, SLS)
01:33:18 - Emerging Process Technologies

[@mhgscrubadub9917]

Such an amazing presentation. I cant believe this came out 5 years ago. Definitely is living up to the facts that are displayed. So many good points that I wouldn't have thought about otherwise.

[@tarekhussein2403]

the best introduction about AM in youtube.. Thanks :)

[@glassmansito]

Dear Professor John Hart Magnificent information, definitely that is a really useful tool for my colleges and me . Thanks for clarify some questions and the same time for improve our knowledge.

[@holden_leonidas]

Dear Professor ,Thanks for this video,best regards from Turkey.

[@Accessible3D]

Im brand new to SLS, this video is so informative. Thank you for putting it out.

[@anonviewerciv]

Love it when the description comes with timestamps. 7:37 Definition. 37:37 Techniques by energy requirement.

[@ajitsingh-wi1mx]

😊

[@sinanmertorgun]

Thank you for this very complete lecture, will definitely be using what I've learned during my AM researches.

[@clemepi]

Fantastic lesson, thank you.

[@alibashabsheh1909]

The best explanation and simplification of the 3D printing topic. Thanks a lot Prof. Hart :)

[@sumitkumarghosh9542]

Professor John Hart Sir . Very informative information . Thank you Sir .

[@MrJefferson105]

Thank you for clarifying certain things I had problems understanding. I must say that the BAAM printer was impressive.

[@abdulazizabutunis2698]

Dear Professor John Hart As relatively new person to additive manufacturing, I would like to thank you for all these amazing information really appreciate it Wish you all the best

[@samuelliao9216]

Longyi super fine powder grinding machines advantages: 1. Powder from 48~4microns, fineness is adjustable 2. Built-in high efficiency classifier, no more investment cost for classifying system. 3. Smart PLC operation system, and integrated control system: 1 computer could operated max 6 machines, saving management cost. 4. No particle air pollution, more environment-friendly. 5. Compact structure to save factory space and lower foundation construction cost. For CaCO3 powder The whole grinding system including grinding, classifying, powder collector, fan, PLC cabinet, feeding conveyor and others, system power is 370Kw, the real working power is 296KW 1. D97=23um (600mesh) Output: 10tons/h Energy Consumption: 29.6Kw/Ton 2. D97=16um(800mesh) Output: 8tons/h Energy Consumption: 37Kw/Ton 3. D97=10um (1250mesh) Output: 4.5tons/h Energy Consumption: 65.7Kw/Ton 4. D97=6.5um(2000mesh) Output: 2.5tons/h Energy Consumption: 118.4Kw/Ton MP/Wechat/Whatsapp: [phone] Email:[e-mail]

[@gaziarifan6491]

😊😅😅U

[@sambrown8617]

Very informative. Thanks Prof. Hart.

[@ukilic86]

This is a great lecture. Thank you, Prof. Hart!

[@karimi1367]

you got my attention sir. My next research topic for sure

[@ArisFilms]

I can't believe this video is free

[@outiblackburnphdcandidate1997]

Very useful introduction for my circular economy business studies, thank you!

[@amirhosseinsadeghian]

Thank you, professor. Very careful and thorough explanations.

[@carvalhoribeiro]

Great presentation. Thanks for sharing this

[@elvinlukose1481]

Thank you for this lecture, will definitely be doing masters in AM

[@jhoanguzman4397]

the powder bed fusion chapter was amazing, thanks a lot!

[@tayyabrazashah2924]

Because it is the most important subject these days.

[@norvindcosta6466]

Thoroughly enjoyable lecture!

[@ursjenny143]

Very much informative and complete overview of AM and its process.

[@TheMadMagician87]

Great stuff, thanks for sharing

[@user-tf7cp3be4z]

Thanks for the Video Professor

[@ashwadhwani]

Superbly presented to say the least

[@ashwadhwani]

@@renal-dr7st I invite you to be human first

[@rajkiran5490]

Thank You Professor for the informative lecture

[@jenpsakiscousin4589]

We had what was then called rapid prototype machines back in 89. As a Tool and mold maker we are always looking for new technology. I don't think additive manufacturing will replace traditional material removal machining techniques outright but will play a big role in manufacturing in the future.

[@DatBoiOrly]

i agree with this, AM especially if we're talking about metals have a very small grain structure compared to RM which makes them weaker than parts made from RM

[@shineauto005]

Wonderful introduction with a great cognitive content.

[@pferrer9751]

Great, thank you! Possible to get the presentation?

[@TysonBrazilleYHWH]

Great content! ✌️

[@mikeconnery4652]

Excellent video superb presentation

[@koenleekens1419]

The first 3D printer, which used the stereolithography technique, was created by Charles W. Hull in the mid-1980s

[@Mrbrightside75]

Thank you! Don't know why his statement made me irrationally angry but I'm glad someone else caught it.

[@zoltanmeksz7625]

Excellent.

[@masoomeharobli3826]

Hi already I appreciate you for this video. I'm a civil_structural master's student at the University of Tabriz and I'm going to work additive manufacturing in my thesis in MATLAB and I wanna use this method I mean additive manufacturing in my thesis........... can u help me about the roles? I'm so confused about this matter and I scare thank U

[@tayyabrazashah2924]

Tomorrow I've PhD admission interview presentation, I'm very hopeful that your lecture gonna help me a lot. Thanks

[@puskarpathak8913]

rightly found, I have the same tomorrow)

[@puskarpathak8913]

went well, thanks for asking Tayyab)

[@mustafasut7606]

Mr. Hart, The minarets of Hagia Sophia are slightly sloping outwards. The reason is the architect Sinan minarets, minarets fall in any earthquake and the Hagia Sophia mosque should not damage. Thanks.

[@ananthmaran]

awesome

[@amaetfacquodvis2450]

Very good video!

[@amaetfacquodvis2450]

@@renal-dr7st wtf?

[@josephfelderhoff1965]

Not an MIT student but thanks for sharing this.

[@peterdoyle8571]

Several problems noted with the 3d printer devices shown 1) The components that make up the 3D printers are too big 2) The feed stock wire used in most wire feed machines is too thick 4) There is only one feed wire not multiple fine wire stock feeding into a given machine. 3) There are not enough print heads crammed into a small enough area Idea: 1) What if the feed stock could be significantly thinned 2) What if numerous micro print heads could protrude from a flat surface 3) What if that flat surface from which the micro-print head protruded could make minute shift like a pixel shifting false 4k projector 5) What if that same surface could also make large movements in the x, y and z planes 4) What if a ultra-mini heat source (for melting ultra thin feed stock) could be added externally or internally to each of the micro-print heads Would such a theoretical 3d printer print more dimensionally accurate 3d parts? Could such a 3d printer be made to print metal parts? Does current miniaturization technology exist that could be repurposed or used to create micro-print heads? Could Wire feed stock be created that was thin enough to feed said 3d printer? Could the printer somehow thin said wire further to meet specs for microscopic print heads?

[@parmvirsingh7943]

Which one has more strength additive manufacturing or subtractive manufacturing

[@munishchhabra8196]

excellent

[@corethunder764]

What percentage of parts made by AM in 2016 were functional parts?

[@andrejunli-2g987]

I aspired to MITs RP/AM/3DP activities as a freshman 30-35 years ago (CADCAM CNC manf era etc)

[@adammontgomery7980]

I think AM takes more time in general, but I'm excited to see where the marriage of procedural generation and AM takes us.

[@samuelliao9216]

Longyi super fine powder grinding machines advantages: 1. Powder from 48~4microns, fineness is adjustable 2. Built-in high efficiency classifier, no more investment cost for classifying system. 3. Smart PLC operation system, and integrated control system: 1 computer could operated max 6 machines, saving management cost. 4. No particle air pollution, more environment-friendly. 5. Compact structure to save factory space and lower foundation construction cost. For CaCO3 powder The whole grinding system including grinding, classifying, powder collector, fan, PLC cabinet, feeding conveyor and others, system power is 370Kw, the real working power is 296KW 1. D97=23um (600mesh) Output: 10tons/h Energy Consumption: 29.6Kw/Ton 2. D97=16um(800mesh) Output: 8tons/h Energy Consumption: 37Kw/Ton 3. D97=10um (1250mesh) Output: 4.5tons/h Energy Consumption: 65.7Kw/Ton 4. D97=6.5um(2000mesh) Output: 2.5tons/h Energy Consumption: 118.4Kw/Ton MP/Wechat/Whatsapp: [phone] Email:[e-mail]

[@ratulbiswas1812]

Gonna enroll!

[@_blair5759]

Great

[@Perfectslim7days]

😍️

[@u.c.v]

I got really surprised when I saw Hagia Sophia is one of the first examples of 3D printing 😳

[@parmvirsingh7943]

Great 3d printer

[@_elkd]

Wow

[@clementchukwuka6477]

Pls i need help on the topic, addictive manufacturing technology for component production

[@clementchukwuka6477]

My email - [e-mail]

[@jimmyc451]

at 22:08 why can't electronic connectors be built with that material?

[@ajitsingh-wi1mx]

😊😊😊

[@glennedward2201]

So many variables that affect quality and performance. $1,000 printers will replace $10,000 printers and $20,000 printers will replace $100,000 printers. Sooner than many realize. The biggest difference rigidity between machines and quality of extruder. Surprised there wasn’t any discussion about DLP or LCD resin printing. Both i can see dominating this market. We are already seeing 4k to 8k resolution quality prints on desktops

[@JoeCali12]

in this day and age, needs to be an emphasis on material strength overall. Automation is great, but too much quality issues falling through the "cracks" --- get it? Ok bad joke.

[@forheuristiclifeksh7836]

31:57

[@ravichandel8690]

what about convntional machinist

[@user-tq5qq1de6y]

강무진교수님 수업들으시는분??

[@ravichandel8690]

are there jobs in additive manufacturing

[@gelraldoldo5152]

I wish I was smart....and good looking.

[@VahoSuhumskiy]

Бю.😊😊

[@michaelgimbel4418]

18:56 *FEA of a potato chip model* rofl

[@antonmursid3505]

Antonmursid🙏🙏🙏🙏🙏🇮🇩🇮🇩🇮🇩🇮🇩🇮🇩💝✌🙌👌

[@coraneibarger9036]

I'm sorry but 3D printing was not invented at MIT. A form of it was invented the very first 3d printer patent was back in 1981 for Hideo Kodama of Japan. then come back to the united states and you have chuck hull " Hull would file his patent for a stereolithography machine a mere three weeks after the French team had filed their patent application. Hull’s application was not to be abandoned, however. In 1986, Hull named the process stereolithography, which remains one of the most common 3D printing techniques today" hull had the first 3d printer in the united states. here is my main source www.cadcrowd.com/blog/a-brief-history-of-3d-printing/

[@bassio16]

I'm sorry but this is what Prof. Hart explained in the video. A "form" of 3D printing was invented at MIT. The form he refers to is binder jetting btw. Kodama was also handled in this video.

[@danielross51086]

You must work for CNN?

[@dodobarbar]

hey buddy, you are so outdated!!